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首页> 外文期刊>Agronomy Journal >Phosphorus and sediment in runoff after core cultivation of creeping bentgrass and perennial ryegrass turfs.
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Phosphorus and sediment in runoff after core cultivation of creeping bentgrass and perennial ryegrass turfs.

机译：core草和多年生黑麦草皮的核心栽培后，径流中的磷和沉积物。

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Limited research has been conducted on nutrient and sediment loss in runoff from mechanically disturbed turfgrass sites. This study assessed the effect of turfgrass species after core cultivation and fertilization on total dissolved P (as PO43-) loss and sediment transport. Six sloped (9-11%) plots (18.9 by 6.4 m or 121 m2) consisting of either creeping bentgrass (Agrostis palustris Huds.) or perennial ryegrass (Lolium perenne L.) were maintained as golf course fairways. Composite runoff samples were collected after simulated rainfall (152 mm h-1) and sediment yield was determined. Phosphate-P concentrations in runoff were equal to or lower than previously reported losses from turfgrass sites and were highest, 6 mg L-1, within 24 h after fertilizer application. The initially high PO43--P concentrations were temporary and decreased with time. Phosphate-P export was significantly higher for perennial ryegrass than creeping bentgrass on one occasion following fertilization and simulated rainfall. Sediment loading did not differ between turfgrass species and was considered low, never exceeding 0.35 kg ha-1. As a consequence, the initially high but temporary PO43--P concentrations found in runoff, and the minimal erosion, should not be considered a serious threat to surface waters after core cultivation..
机译：对于受到机械干扰的草皮草产地的径流中养分和沉积物的流失已经进行了有限的研究。这项研究评估了核心种植和施肥后草皮草物种对总溶解磷（以PO43-形式）损失和沉积物迁移的影响。六个倾斜的土地（9-11％）（18.9 x 6.4 m或121 m2）被保留为高尔夫球场球道，由蠕动的草丛（Agrostis palustris Huds。）或多年生黑麦草（Lolium perenne L.）组成。在模拟降雨（152 mm h-1）之后收集复合径流样品，并确定沉积物产量。施肥后24小时内，径流中的磷P浓度等于或低于先前报道的草皮草损失，并且最高，为6 mg L-1。最初较高的PO43-P浓度是暂时的，并随时间降低。在施肥和模拟降雨之后，多年生黑麦草的磷磷出口量显着高于creep草。不同草皮草的沉积物含量没有差异，被认为很低，从未超过0.35 kg ha-1。因此，不应将径流中最初较高但暂时的PO43-P浓度以及最小程度的侵蚀视为核心种植后对地表水的严重威胁。

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